package com.example.util;

import org.springframework.stereotype.Component;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

/**
 * @ClassName CORSFilter
 * @Description TODO
 * @Author zhangzuorui
 * @Date 2020/12/21 17:23
 * @Version 1.0
 */
@Component
@WebFilter(filterName = "CORSFilter", urlPatterns = "/*")
public class CORSFilter implements Filter {
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
        // Do nothing
    }

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException, IOException {
        HttpServletResponse response= (HttpServletResponse) servletResponse;
        response.setHeader("Access-Control-Allow-Origin", "*");
        response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE");
        response.setHeader("Access-Control-Max-Age", "3600");
        response.setHeader("Access-Control-Allow-Headers", "x-requested-with");
        response.setHeader("Access-Control-Allow-Credentials", "true");
        response.setHeader("XDomainRequestAllowed","1");
        filterChain.doFilter(servletRequest,servletResponse);
    }

    @Override
    public void destroy() {
        //Do nothing
    }
}
